A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 5998-01-554-6280
NSN 6320-01-209-0952
NSN 5985-00-273-6837
NSN 6610-00-345-3440
NSN 6135-00-995-1089
NSN 5960-00-577-6942
NSN 5910-00-083-4939
NSN 5960-01-338-3412
NSN 5960-01-503-8411
NSN 5935-01-481-4479
NSN 5975-01-188-7325
NSN 6650-01-157-8806